Equity (Reclassifications Out of Accumulated Other Comprehensive Income (Loss)) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net investment gains (losses)	$ (242)	$ (240)	$ (63)
Net investment income	4,560	4,064	4,815
Net derivative gains (losses)	(3,920)	(585)	(3,986)
Income (loss) before provision for income tax	(1,506)	4,506	2,142
Income tax (expense) benefit	383	(795)	(379)
Net income (loss)	(1,123)	3,711	1,763
Reclassification out of Accumulated Other Comprehensive Income
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net income (loss)	(152)	(144)	3
Reclassification out of Accumulated Other Comprehensive Income | Net unrealized investment gains (losses):
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net investment gains (losses)	(192)	(182)	(4)
Net derivative gains (losses)	(12)	(20)	(3)
Income (loss) before provision for income tax	(204)	(202)	(7)
Income tax (expense) benefit	43	42	1
Net income (loss)	(161)	(160)	(6)
Reclassification out of Accumulated Other Comprehensive Income | Unrealized Gains (Losses) on Derivatives
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Income (loss) before provision for income tax	11	21	12
Income tax (expense) benefit	(2)	(5)	(3)
Net income (loss)	9	16	9
Reclassification out of Accumulated Other Comprehensive Income | Unrealized Gains (Losses) on Derivatives | Interest rate swaps
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net investment income	3	4	3
Net derivative gains (losses)	1	5	2
Reclassification out of Accumulated Other Comprehensive Income | Unrealized Gains (Losses) on Derivatives | Foreign currency swaps
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net derivative gains (losses)	$ 7	$ 12	$ 7